<?php

require_once 'HTMLPurifier/DefinitionCache/Decorator.php';

/**
 * Definition cache decorator class that saves all cache retrievals
 * to PHP's memory; good for unit tests or circumstances where 
 * there are lots of configuration objects floating around.
 */
class HTMLPurifier_DefinitionCache_Decorator_Memory extends
	  HTMLPurifier_DefinitionCache_Decorator
{
	
	var $definitions;
	var $name = 'Memory';
	
	function copy() {
		return new HTMLPurifier_DefinitionCache_Decorator_Memory();
	}
	
	function add($def, $config) {
		$status = parent::add($def, $config);
		if ($status) $this->definitions[$this->generateKey($config)] = $def;
		return $status;
	}
	
	function set($def, $config) {
		$status = parent::set($def, $config);
		if ($status) $this->definitions[$this->generateKey($config)] = $def;
		return $status;
	}
	
	function replace($def, $config) {
		$status = parent::replace($def, $config);
		if ($status) $this->definitions[$this->generateKey($config)] = $def;
		return $status;
	}
	
	function get($config) {
		$key = $this->generateKey($config);
		if (isset($this->definitions[$key])) return $this->definitions[$key];
		$this->definitions[$key] = parent::get($config);
		return $this->definitions[$key];
	}
	
}

